package com.kexio.security.controller;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.DeleteMapping;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.PutMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

import com.kexio.common.dto.Result;
import com.kexio.core.security.service.RbacService;
import com.kexio.dynamic.feature.annotation.FeatureToggle;
// import com.kexio.dynamic.permission.service.DynamicPermissionService;
// import com.kexio.enterprise.governance.ratelimit.annotation.RateLimit;
// import com.kexio.enterprise.observability.logging.annotation.OperateLog;

import io.swagger.v3.oas.annotations.Operation;
import io.swagger.v3.oas.annotations.Parameter;
import io.swagger.v3.oas.annotations.tags.Tag;

/**
 * 动态权限管理控制器
 * 
 * @author kexio
 */
@RestController
@RequestMapping("/api/permissions")
@Tag(name = "动态权限管理", description = "动态权限控制API")
public class PermissionController {

    @Autowired
    private RbacService rbacService;

    // private final DynamicPermissionService permissionService;

    public PermissionController(RbacService rbacService) {
        this.rbacService = rbacService;
        // this.permissionService = permissionService;
    }

    /**
     * 检查用户权限
     */
    @Operation(summary = "检查用户权限", description = "检查用户是否具有指定权限")
    @GetMapping("/check")
    public ResponseEntity<Result<Boolean>> checkPermission(
            @RequestParam Long userId,
            @RequestParam String permission) {
        
        try {
            boolean hasPermission = rbacService.hasPermission(permission);
            return ResponseEntity.ok(Result.success(hasPermission));
        } catch (Exception e) {
            return ResponseEntity.ok(Result.error("权限检查失败: " + e.getMessage()));
        }
    }

    /**
     * 检查当前用户权限
     */
    @Operation(summary = "检查当前用户权限", description = "检查当前用户是否拥有指定权限")
    // @RateLimit(key = "check_permission", rate = 100, per = 60, description = "权限检查限流：每分钟100次")
    @FeatureToggle(value = "dynamic_permission_check", description = "动态权限检查功能",
                   onDisabled = FeatureToggle.DisabledStrategy.THROW_EXCEPTION,
                   disabledMessage = "动态权限检查功能暂时禁用")
    // @OperateLog(module = "权限管理", operation = "检查权限", type = OperateLog.OperationType.READ,
    //            detail = "检查权限: #{permission}")
    @GetMapping("/check-current")
    public ResponseEntity<Result<Boolean>> checkCurrentUserPermission(
            @Parameter(description = "权限标识", required = true) @RequestParam String permission) {
        
        boolean hasPermission = rbacService.hasPermission(permission);
        return ResponseEntity.ok(Result.success(hasPermission));
    }

    /**
     * 授予权限
     */
    @Operation(summary = "授予权限", description = "给用户或角色授予指定权限")
    // @RateLimit(key = "grant_permission", rate = 10, per = 60, description = "授权限流：每分钟10次")
    @FeatureToggle(value = "permission_management", description = "权限管理功能",
                   onDisabled = FeatureToggle.DisabledStrategy.THROW_EXCEPTION,
                   disabledMessage = "权限管理功能暂时禁用")
    // @OperateLog(module = "权限管理", operation = "授予权限", type = OperateLog.OperationType.CREATE,
    //            detail = "授予权限: #{permission} 给 #{targetType}:#{targetId}")
    @PostMapping("/grant")
    public ResponseEntity<Result<Boolean>> grantPermission(
            @RequestBody Map<String, Object> request) {
        
        try {
            // 这里应该调用动态权限服务，目前返回成功
            // permissionService.grantPermission(...);
            return ResponseEntity.ok(Result.success("权限授予成功", true));
        } catch (Exception e) {
            return ResponseEntity.ok(Result.error("权限授予失败: " + e.getMessage()));
        }
    }

    /**
     * 撤销权限
     */
    @Operation(summary = "撤销权限", description = "撤销用户或角色的指定权限")
    // @RateLimit(key = "revoke_permission", rate = 20, per = 60, description = "权限撤销限流：每分钟20次")
    // @OperateLog(module = "权限管理", operation = "撤销权限", type = OperateLog.OperationType.DELETE,
    //            detail = "撤销权限: #{permission} 从 #{targetType}:#{targetId}")
    @DeleteMapping("/revoke")
    public ResponseEntity<Result<Boolean>> revokePermission(
            @RequestBody Map<String, Object> request) {
        
        try {
            // 这里应该调用动态权限服务
            // permissionService.revokePermission(...);
            return ResponseEntity.ok(Result.success("权限撤销成功", true));
        } catch (Exception e) {
            return ResponseEntity.ok(Result.error("权限撤销失败: " + e.getMessage()));
        }
    }

    /**
     * 获取用户权限列表
     */
    @Operation(summary = "获取用户权限", description = "获取指定用户的所有权限")
    @GetMapping("/user/{userId}")
    public ResponseEntity<Result<List<String>>> getUserPermissions(
            @Parameter(description = "用户ID", required = true) @PathVariable Long userId) {
        
        try {
            List<String> permissions = rbacService.getUserPermissions(userId);
            return ResponseEntity.ok(Result.success(permissions));
        } catch (Exception e) {
            return ResponseEntity.ok(Result.error("获取用户权限失败: " + e.getMessage()));
        }
    }

    /**
     * 获取角色权限列表
     */
    @Operation(summary = "获取角色权限", description = "获取指定角色的所有权限")
    @GetMapping("/role/{roleId}")
    public ResponseEntity<Result<List<String>>> getRolePermissions(
            @Parameter(description = "角色ID", required = true) @PathVariable Long roleId) {
        
        try {
            List<String> permissions = new ArrayList<>(); // TODO: 实现获取角色权限
            return ResponseEntity.ok(Result.success(permissions));
        } catch (Exception e) {
            return ResponseEntity.ok(Result.error("获取角色权限失败: " + e.getMessage()));
        }
    }

    /**
     * 批量权限检查
     */
    @Operation(summary = "批量权限检查", description = "一次检查多个权限")
    // @RateLimit(key = "batch_check_permission", rate = 50, per = 60, description = "批量权限检查限流：每分钟50次")
    @PostMapping("/batch-check")
    public ResponseEntity<Result<Map<String, Boolean>>> batchCheckPermissions(
            @RequestBody List<String> permissions) {
        
        try {
            Map<String, Boolean> results = new java.util.HashMap<>();
            for (String permission : permissions) {
                results.put(permission, rbacService.hasPermission(permission));
            }
            return ResponseEntity.ok(Result.success(results));
        } catch (Exception e) {
            return ResponseEntity.ok(Result.error("批量权限检查失败: " + e.getMessage()));
        }
    }

    /**
     * 清理权限缓存
     */
    @Operation(summary = "清理权限缓存", description = "清理权限相关的缓存数据")
    @FeatureToggle(value = "permission_cache_management", description = "权限缓存管理功能")
    // @RateLimit(key = "clear_permission_cache", rate = 5, per = 300, description = "清理权限缓存限流：每5分钟5次")
    // @OperateLog(module = "权限管理", operation = "清理权限缓存", type = OperateLog.OperationType.UPDATE,
    //            detail = "清理权限缓存")
    @PostMapping("/clear-cache")
    public ResponseEntity<Result<Boolean>> clearPermissionCache() {
        
        try {
            // 这里应该清理权限相关缓存
            return ResponseEntity.ok(Result.success("权限缓存清理成功", true));
        } catch (Exception e) {
            return ResponseEntity.ok(Result.error("权限缓存清理失败: " + e.getMessage()));
        }
    }
}
